Engineering topics

Bucher, W.

Publications and source records attributed to Bucher, W..

4 records

NASA NTRS1973

The physical nature of interplanetary dust as inferred by particles collected at 35 km

Particles were collected at an altitude of 35 km by two flights of a volume sampling micrometeorite collector. The collection scheme is very sensitive and is capable of collecting a significant number of particles. Many of the particles collected have chemical compositions similar to solar or to iron meteorites. Morphology of collected particles indicates that both true micrometeorites and ablation products were collected.

Brownlee, D. E.↗

NASA NTRS1972

Primary and secondary micrometeoroid impact rate on the lunar surface: A direct measurement

Determination of the number of micrometeoroid impact craters on the camera provided an opportunity to make a sensitive direct measurement of the flux of interplanetary dust particles impacting the lunar surface. Optical and scanning electron microscope studies were performed. Low velocity impact and flux analyses are presented.

Brownlee, D. E.↗

NASA NTRS1972

Whiskers on the moon

The existence of whiskers on lunar soil grains was observed. It is hypothesized that the fibers on these particles are whiskers that grew from clouds of vaporized lunar rock during macro-sized cratering events.

Brownlee, D. E.↗

NASA NTRS1971

Micrometeoroid flux from Surveyor glass surfaces

Micrometeoroid flux determination from impact sites on Surveyor 3 TV camera optical filter surfaces, noting agreement with Pioneer, Cosmos and Pegasus spacecraft measurements

Brownlee, D.↗